/Engine/Source/Runtime/Core/Public/Math/TransformCalculus2D.h
Invert the shear. The result is NOT a shear, but must be represented by a generalized 2x2 transform. Defer the implementation until we can declare a 2x2 matrix. [1 YY]^-1 == 1/(1-YY*XX) * [1 -YY] [XX 1] [-XX 1]
[TMatrix2x2](API\Runtime\Core\Math\TMatrix2x2)< T > Inverse() const